Download 78M6612 Split Phase Evaluation Board User Manual

78M6612 Split-Phase Evaluation Board User Manual
UM_6612_044
1.3 Safety and ESD Notes
EXERCISE CAUTION WHEN LIVE AC VOLTAGES ARE PRESENT!
Standard ESD precautions must be taken when handling electronic equipment. The
78M6612 contains ESD protected interfaces.
Do not connect test equipment, ICE emulators or external development boards directly to the
78M6612 Split-Phase hardware. Damage to the 78M6612 and external equipment will occur due to
the 78M6612’s “high side” reference topology. The 78M6612’s V3P3 (i.e. “high side”) is connected
directly to Neutral (Earth Ground) creating a ground reference disparity with any properly
grounded external equipment.
1.4 Firmware Demo Code Introduction
The Firmware Demo Code provides the following features:
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Basic energy measurement data such as Watts, Volts, current, VAR, VA, phase angle, power factor,
accumulated energy, frequency, date/time, and various alarm statuses.
Control of alarm thresholds, calibration coefficients, temperature compensation, etc.
The following setup is used to facilitate performance evaluation between the user at the PC host and the
firmware code in the board:
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The Command Line Interface (CLI) via HyperTerminal or comparable terminal emulator on a different
operating system. Information about the CLI is presented in Section 3.0.
The 78M6612 Split-Phase Evaluation Board is shipped with Demo Code Revision 1.14c or later loaded in
the 78M6612 chip and included on the CD. The code revision can be verified by entering the command >i
via the command line interface. Firmware for the Evaluation Board can be updated using either the
Teridian TFP2 or an in-circuit emulator such as the Signum Systems ADM51 (www.signum.com).
The board components and firmware settings are designed to operate with the following nominal AC
electrical ranges:
Voltage
Current
Line Frequency
110-240 VAC
10 mA – 20A
46-64 Hz
1.5 Testing the 78M6612 Split-Phase Evaluation Board Prior to Shipping
Before every 78M6612 Split-Phase Evaluation Board is shipped, the following procedures have been
performed at the factory:
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Full Calibration – Precise energy source equipment is used to calibrate the current and voltage. The
temperature is also calibrated at the same time.
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Accuracy Test – This “bench” level test ensures the energy accuracy is within ±0.5%.
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Rev. 1.1